5 sentences

1. 这个学年从九月开始。

   zhè gè xué​nián cóng Jiǔ​yuè kāi​shǐ.

   This academic year starts in September.

   Source: Dong Chinese Dictionary

2. 我们学校九月一号开学。

   wǒ​men xué​xiào Jiǔ​yuè yī​hào kāi​xué.

   Our school year starts on September 1st.

   Source: Dong Chinese Dictionary

3. 九月是学生返校的季节。

   Jiǔ​yuè shì xué​sheng fǎn​xiào de jì​jié.

   September is the season for students to go back to school.

   Source: Dong Chinese Dictionary

4. 这所大学每年九月开始招生。

   zhè suǒ dà​xué měi​nián Jiǔ​yuè kāi​shǐ zhāo​shēng.

   The university begins enrollment every September.

   Source: Dong Chinese Dictionary

5. 农历九月初九是重阳节。

   nóng​lì Jiǔ​yuè chū​jiǔ shì Chóng​yáng​jié.

   The ninth day of the ninth lunar month is the Double Ninth Festival.

   Source: Dong Chinese Dictionary